This hidden Art Nouveau courtyard is an opulent feast for the eyes.

An enigmatic modern marker left next to a historic Roman site.

Rome is now home to a stunning food museum and library.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

This ancient Roman arch misled treasure hunters for centuries.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

A burial vault located under Tiber Island in the middle of the Italian capital.

This is the oldest Roman-made bridge in the city still existing in its original state.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

A massive marble foot is tucked away in a small alley near the Pantheon.

A statue representing a lost Roman profession that was vandalized for centuries.

A forgotten "city of water" underneath the famous Trevi district.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

An expansive collection donated by an heirless nobleman formed this admission-free civic museum.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Architectural monsters are devouring this palace's every door and window.

Inside this building is another country within Rome, a sovereign entity without a physical territory.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.